Tension controlling means



June 4, H A w WOOD TENSION CONTROLLING MEANS Original Filed Dec. 8, 1931 2 Sheets-Sheet l June 4, 1935.

H. A. W. WOOD TENSION CONTROLLING MEANS Original Filed Dec. 8, 1931 2 Sheets-Sheet 2 fm; r

Patented June 4, 1935 t 2,003,569 TEN SIQN CONTROLLING MEANS Henry A. Wise Wood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation, New

York, N. Y., a corporation of Virginia Application December 8, 1931, Serial No. 579,760 Renewed March 12, 1934 4 Claims. (Cl. 24275) This invention relates to the means employed of idlers I3. I have shown the belts or straps l2, for controlling the speed of the web drawn oil each as having a downwardly extending loop a supply roll and supplied to a machine, as for from two of these idlers and provided with a example, a printing press, and used to prevent pulley l4 hanging in the loop. This loop has a 5 the web from racing. yoke l5 carrying weights Hi to hold the belt tight The principal objects of this invention are to and provide normal tension. Of course, in the provide a tension device, in the form of one or case of a plurality of belts they will all be arranged more belts, with means for locking it so as to act in the same way preferably. as a stationary strap when normal tension is de- From what has been said it will be seen that sired and which may be released so that it will the belts will run with the web if no restriction is 0 run along with the paper and move with the same provided and accomplish in that case no funcspeed without providing any tension while the tion. For the purpose of holding the belts stapress is accelerated. tionary, each one of them is brought under and Other objects and advantages of the invention around a pulley l7 running freely, of course. This will appear hereinafter. pulley is mounted in bearings on a stationary- 15 Reference is to be had to the accompanying bracket l8 on which at one side is pivoted a brake drawings, in which shoe Hi. This brake shoe is shown as swinging Fig. 1 is an end view of a web roll supporting back by gravity into the position shown in Fig. 3 device with tension belts and a preferred emwhenever released. In this position the belt does bodiment of this invention applied thereto; not supply any tension. 20 Fig. 2 is a side view of the same as indicated When tension is desired, a handle 20 on a lock by the arrow 2 in Fig. 1, and ing eccentric 2| is turned, as shown in Fig. 1, to

Fig. 3 is a view similar to Fig. 1 of the locking bring the eccentric or cam 2| upwardly and move means in unlocked position to allow the web to the brake shoe I9 up into contact with the belt move as fast as it is drawn into the press without or strap. It will be seen that the eccentric is so 25 applying tension. shaped that when the handle is brought around This invention is particularly adapted for to the position shown in Fig. 1 the brake shoe modern newspaper presses but capable of other H) will be held against the belt by the weight of uses. Such presses are supplied with paper from the handle and the belt will be stopped, or the a paper roll as ID and II and the tension can be pressure may be only enough to retard the belt 30 secured in many ways. For the purpose of illusbut to let it run slowly and supply a small amount lirain hi nv n i n i is shown as provided of tension. Thus it will apply the proper tension W h tension belts l2 running against the surof a stationary strap to the web. This is the face of the supply roll l0 and, of course, when normal running condition. the new roll ll comes around that will come into New in starting the press or in starting a new 35 position to receive tension from the same belts. roll, the handle 20 is pulled or kicked over int In O d na y practice these p s are run at the position shown in Fig. 3 against a stop 22 and 40 P v its running ahead in the folder- NO tained only while the roll is being accelerated up 40 CeSS ve St a is Pu 011 the Paper When running to full speed and then the operator moves the at Constant sp H When the Dress operating handle 20 back to the position shown Started H9113 draws 1155 paper from the full You in Fig. 1 and the belts act thereafter, as stationand there 15 an added Sham on the paper owing ary straps as stated above. One of these locks to the fact that this roll has to be brought up to may be used for each trap and h one oper- 46 Speed by pull of Web upon ated independently, if desired.

h usmg a statlonal'y Strap, the normal I have shown the manual operation of this retenslon 1s always pre t. W the running lease but, of course, I am not limited to the same S r p, whi is r n t a slightly less speed than as the operation of the press above described 60 that of the paper to maintain normal tension, would otherwise be the same if the operation of 50 there is no assistance to the roll when the press the lock were automatic. The invention is capais being accelerated. ble of use with other kinds of tension devices than In the particular form shown these straps or straps and belts. I have shown the invention belts are made endless and capable of running used in cooperation with mechanism 25' consti- 65 continuously. They are supported by a series tuting apart or a splicing mechanism but the invention is as easily applicable to paper carrying devices carrying no automatic splicing device.

It will be apparent therefore that mechanism is presented which permits the proper feeding of paper to a press with a minimum amount of strain, accomplished by releasing the tension on the paper roll during acceleration of the press.

Although I have illustrated and described only one form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to be limited in this respect, otherwise than as set forth in the claims, but what I claim is:--

1. In a device for controlling the operation of a tension belt, the combination of a pulley around which the belt passes, a brake shoe adapted to engage the belt passing around the pulley, and means for holding the brake shoe against the belt on the pulley.

2. In a device for controlling the operation of an endless tension belt, the combination of a pulley around which the belt passes, a brake shoe adapted tov engage the belt passing around the pulley and means for holding the brake shoe against the belt on the pulley, said means being easily releasable to allow the brake shoe to drop away from the pulley and belt to release the belt.

3. In a tension device for the purpose described, the combination of an endless belt having a downwardly extending loop, a pulley freely mounted in fixed bearings and located in said loop, a brake shoe pivoted at one side of the pulley and adapted to engage the belt, whereby when released it will drop down from its pulley by gravity and an eccentric device in position to engage the bottom of the brake shoe and move it into contact with the belt to stop or retard the belt, for the purpose described.

4. In a tension device for the purpose described, the combination of a tension belt, a surface over which the belt is adapted to run, a brake shoe adapted to engage the belt to press it against said surface to retard or stop the belt, and means by which the brake shoe is easily moved away from the belt to release it.

, HENRY A. WISE WOOD. 

